Multiscale simulation of dynamic recrystallization for α-Mg phase in Mg/LPSO alloys based on multi-phase-field and dislocation-based crystal plasticity model

Yuichi Kimura, Sho Kujirai, Ryo Ueta, Kazuyuki Shizawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Magnesium alloy with Long-Period Stacking Ordered Structure (LPSO) and α-Mg (ordinary HCP structure) phase is expected for a new structural material due to its excellent mechanical properties. Its materials strengthening arises from the kink band formation in LPSO phase and the grain refinement of α-Mg phase in the vicinity of LPSO phase because of recrystallization. In the present study, a multiscale and multiphysics computation for the dynamic recrystallization in α-Mg phase is carried out by coupling the dislocation-based crystal plasticity model for HCP crystals proposed previously by the authors with the multi-phase-field model through dislocation density. In the present model, not only the environmental temperature-dependences of nucleation and nucleus growth but also a pinning effect of boundary migration of recrystallized grain boundary owing to existence and influence of additive elements are newly taken into account. Furthermore, grain size behaviors of recrystallized nuclei are investigated for various volume fractions of additive element and ratios of grain boundary segregation.

Original languageEnglish
Title of host publicationAdvances in Engineering Plasticity and its Application XIII
EditorsFusahito Yoshida, Hiroshi Hamasaki
PublisherTrans Tech Publications Ltd
Pages243-248
Number of pages6
ISBN (Print)9783035710243
DOIs
Publication statusPublished - 2017 Jan 1
Event13th Asia-Pacific Symposium on Engineering Plasticity and its Applications, AEPA 2016 - Hiroshima, Japan
Duration: 2016 Dec 42016 Dec 8

Publication series

NameKey Engineering Materials
Volume725 KEM
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Other

Other13th Asia-Pacific Symposium on Engineering Plasticity and its Applications, AEPA 2016
CountryJapan
CityHiroshima
Period16/12/416/12/8

Keywords

  • Crystal Plasticity
  • Dislocation
  • Dynamic Recrystallization
  • Mg/LPSO Alloy
  • Phase-field

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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    Kimura, Y., Kujirai, S., Ueta, R., & Shizawa, K. (2017). Multiscale simulation of dynamic recrystallization for α-Mg phase in Mg/LPSO alloys based on multi-phase-field and dislocation-based crystal plasticity model. In F. Yoshida, & H. Hamasaki (Eds.), Advances in Engineering Plasticity and its Application XIII (pp. 243-248). (Key Engineering Materials; Vol. 725 KEM). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/KEM.725.243